LTC3 Cell Protection
LTC3 Cell Protection is an open source PCB design by psas: a 4-layer, 94 × 71 mm board with 69 components (35 distinct parts). It is built around the BQ77PL900, LTC2990.
CAD files and software for the launch tower computer (LTC)
This subdirectory contains everything related to the third generation launch tower computer (LTC3), with the exception of the userspace software, which is contained in the [launch-tower-comm][1] repo.
[1]: https://github.com/psas/launch-tower-comm
For a quick introduction to the project, read the [Requirements doc][2] at ./doc/requirements/LTC3RequirementsSpec.adoc
Built around
Parts list
69 components, 35 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BQ77PL900 | BQ77PL900 | U1 |
| 1 | LTC2990 | MSOP-10 | U2 |
| 4 | SUM110P08-11 | TO-263-3Lead | Q1, Q2, Q4, Q5 |
| 1 | NDS9407 | SO-8 | Q3 |
| 1 | XH header | JST_SHL_SM02B-SHLS-TF_02x1.00mm_Angled | P1 |
| 1 | pin header | Pin_Header_Straight_1x02 | P2 |
| 3 | XH header | Molex_Microfit3_Header_02x02_Straight_43045-0428 | P3, P7, P8 |
| 1 | XH header | JST_XH_B08B-XH-A_08x2.50mm_Straight | P4 |
| 1 | XH header | JST_EH_B04B-EH-A_04x2.50mm_Straight | P9 |
| 1 | XH header | JST_EH_B02B-EH-A_02x2.50mm_Straight | P11 |
| 1 | 10A | Fuseholder_Auto_Blade_Regular_Keystone_3557-2 | F1 |
| 2 | CDSU4148 | SOD-523 | D1, D6 |
| 4 | SMAZ16 | SMA_Standard | D2, D3, D4, D5 |
| 4 | 2.2μ | C_1210 | C1, C2, C3, C18 |
| 1 | 10n | C_0805 | C4 |
| 1 | 4.7μ | C_0805 | C5 |
| 2 | 4.7n | C_0805 | C6, C10 |
| 2 | 1μ | C_0805 | C7, C8 |
| 9 | 0.1μ | C_0805 | C9, C11, C12, C13, C14, C15, C16, C17 +1 |
| 1 | 10k | R_0805 | R1 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 390k | R_0805 | R2 |
| 1 | 820k | R_0805 | R3 |
| 1 | 6.98k | R_0805 | R4 |
| 1 | 61.9k | R_0805 | R5 |
| 2 | 1M | R_0805 | R6, R12 |
| 2 | 1k | R_0805 | R7, R13 |
| 1 | 1.78k | R_0805 | R8 |
| 2 | 200 | R_0805 | R9, R11 |
| 1 | 1m | R_1206 | R10 |
| 8 | 510 | R_0805 | R14, R15, R16, R17, R18, R19, R20, R21 |
| 1 | 100k | R_0805 | R22 |
| 1 | 60m | R_2512 | R23 |
| 1 | 5.6k | R_0805 | R24 |
| 2 | 12k | R_0805 | R25, R26 |
| 2 | 75k | R_0805 | R27, R28 |
